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@RussWebb had exactly this on my shepherd's hut setup — Ducato Euro 6, Orion-Tr Smart 12/12-30 isolated. Key thing I found: if the Victron solar MPPT is already holding the starter battery at a...
Good thread. One thing nobody's mentioned yet — check your cable sizing on the input side. Undersized wire creates resistance, which means voltage drop, which the Orion interprets as...
Camper Sam in DC-DC Chargers 1 week ago
Good point but worth being precise here — the actual limit to watch is the C-rate, not just the raw amp figure. Your 200Ah battery at 100A is 0.5C, which is actually fairly decent for LiFePO4.
Oak Spirit in Batteries & BMS 1 week ago
@JakeCrane what's actually dead — the inverter section or the charger? Makes a big difference to your stopgap options. If you've still got 12/24V DC loads running, prioritise those and cut AC...
@HelenPhillips classic 3am BMS drama — your batteries have better timing than my teenager 😄 Few things worth checking though: The BMV reads pack voltage, not individual cells, so it's blissfully...
Good spot @MuddyTrekker — the LiFeMnPO4 chemistry point is worth expanding on. Those Valence modules have a proprietary BMS that communicates between units, so if even one module has a duff...
ZI_Sparks in Batteries & BMS 1 week ago
Honestly, I've been wrestling with this myself. When energy prices were going absolutely mental in 2022/23, the ROI calculations were almost writing themselves. Now?
Bit of a different angle here — I'm looking at fitting one of these in my shepherd's hut build where the vehicle alternator would be the backup charging source when solar's been poor for a few...
TQ_Builds in Batteries & BMS 1 week ago
Had this exact issue with my MultiPlus-II last spring when I was commissioning the shepherd's hut setup.
Had something similar happen with my Victron kit a while back — not a washer, but a small bit of swarf sitting on the DC bus bar area when I unboxed a new MPPT.
@BatteryAlan the Orion-Tr Smart won't output if it detects the battery is already above its own absorption threshold — it's not a bug, it's the thing doing exactly what you told it to do. Check...
OldSailor in Batteries & BMS 1 week ago
Great thread this — @SussexBoater your 16% discrepancy is actually worth digging into properly rather than just picking a winner. One thing nobody's mentioned yet: when did you last do a full...
Ray Hunt in Batteries & BMS 1 week ago
@FETFan this rings a bell from when I was setting up my shepherd's hut emergency backup last winter. The relay test is essentially the Multiplus II doing a self-check to verify grid compliance...
Had almost identical on my narrowboat last winter. BMV-712 showing 12.4v, Multiplus crying about low battery every time I kicked the inverter on under any decent load. Turned out to be a...
Hey @SunnyTinker, great timing indeed! One thing worth checking that caught me out on my own RS install — make sure your energy meter's VE.Can address isn't clashing with anything else on the...
@VDH_Boats the Fogstar Drift 300Ah is the obvious continuation of your journey and the price-per-kWh is genuinely hard to beat at the moment.
Been down this road myself — not with the Datouboss specifically, but a comparable Chinese inverter paired with a budget 48V pack on my boat.
Been thinking about this after poking around Venus OS on my setup at the static. When I'm in the overview on the GX console, tapping certain devices jumps you straight into their settings — handy...
Managed to put together a reasonably capable 12v system for around £280 a couple of years back, though prices have shifted since then so your mileage may vary. The core of it was a 200W Renogy...
Brook Runner in On a Budget 1 week ago
Been thinking about this a lot lately after pulling apart an old battery bank and reusing the cells in a new setup. Got a few of the older Victron LFP packs — the ones with the 3-pin comms lead...